package com.linuxgt.baidu.zhidao;

/**
 * Created by LIUTENG on 2015-04-29.
 */
public class For9801 {
    public static void main(String[] args) {
        double result=0.0;
        for (int i = 1; i< 100; i++) {
            result-=Math.pow(-1,i)/Math.pow(2*i-1,2);
            System.out.println(result);
        }
    }
}
